Cell Phone Signal Blocker 40M Range Mountable

Like: It's easy to use, just have two switches, one for On/Off other for Low/High power.

Four antennas for four frequencies.

Wall mountable.

Blocks any signal within ~ 10 meters range.

Blocks any but 3G signal ~ 40 meters even with walls.

Works right out of the box. Blocks all phone frequencies including 3G. This unit does what it is supposed to do. I used it mobile and seemed to block all phones at traffic light intersections. In my office, it blocked all phones over a 1400 sq feet. Nicely constructed.

Cons:

Antenna construction is a bit weak. They don't apprear to be very rugged, but work well in stationary mode.